Econoline E150 1/2 Ton V8-5.4L CNG VIN M (1998)
Fuel Gauge Module (CNG): Description and Operation
The Natural Gas Vehicle (NGV) module assembly:
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consists of a 60-pin module, a bracket, a marine cover and four marine cover retainers.
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houses the unique electronics required for natural gas fuel systems.
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is located on the LH inner fender well, behind the coolant recovery bottle.
The NGV module assembly performs the following functions:
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Injector drivers: the NGV module accepts eight unmodified injector signals from the Powertrain Control Module (PCM) and allows a
peak-and-sustain current to flow through the injector solenoids.
NOTE: No injector calculations are performed; the injector driver output is not determined by the NGV module.
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Fuel gauge driver: the NGV module uses tank temperature and fuel tank pressure inputs to calculate the density of the fuel; a look-up table is used
to determine the output signal to the fuel gauge.
